The Vespa housings are fixed in the classic way, mostly by tie rods. Unlike stud bolts, tie rods are not screwed into the housing, but are guided through a bore hole that runs through both housing parts to be connected, and in the case of the Vespa motors are screwed on one side. The other side of the housing bolt (tie rod) has a head without a wrench but with an anti-twist device.
This technique minimizes the continuous effect on the thread, the torque distribution in the housing is better, but the main advantage is of course the more cost-effective production of the housing, because no threads have to be set here.
This bolt with 55mm length is the standard bolt in all largeframe engines like VNB, VBB, Sprint, Rally, PX, Cosa, T5 etc.
In addition, it is also used in the small-frame engines of V50, 50N, PV125, ET3, PK etc.
- Models: Largeframe PX Lusso, Cosa, T5, Smallframe: PK, V50, PV, ET3
- Length: 55mm
- Thread: M7
- Material: Steel, burnished/galvanised
- Scope of delivery: without nut, without washer or snap ring
AI-translation
DE | €
